Pressure-gauge cap



Feb. 2.3 ,"1926.

C. C. NEAL PRESSURE GAUGE CAP Filed 0a. 22L, 1922 patented Feb. 23; 1926.

UNITED STATES PATENT QFFICEi CURTIS C. NEAL, OF IVIARIVIE'I', WEST VIRGINIA, ASSIGNOR, BY MESINE ASSIGNMENTS,

T TIREG-AGE VALVE CORPORATION, OF

PORATION OF WEST VIRGINIA.

CHARLESTON, WEST VIRGINIA, A COR- PRESSURE-GAUGE CAP.

Application filed October 21, 1-922. Serial No. 595,578.

To all whom it may concern:

Be it known that I, CURTIS O. NEAL, a citizen of the United States, residing at i larmet, in the county of Kanawha and State of West Virginia have invented new and useful Improvements in Pressure-Gauge Caps, of which the following is a specification.

In forming transparent pressure gauge caps is is difiicult to so secure the cap which ordinarily formed of glass to a base which can be screwed on to the tire pressure gauge stem. The present invention isdesigned to form a practically sealed joint between the 1 base and glass cap which will at the same time relieve the cap of breaking strains.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a side elevation of a gauge stem with a glass cap in place thereon.

Fig. 2 a side elevation, partly in section, of a glass cap in the process of construction.

Fig. 3 a plan View of a sealing ring.

1 marks the pressure gauge stem, 2 a glass cap. 7 V

The glass cap has an enlarged exterior shoulder 3 at its lower end, this shoulder having a slanting or tapered upper surface 4 terminating preferably in a slight groove 5.

A base 6 has a screw-threaded opening 7 by which it may bescrewed on to the stem and has a socket 8 in which the glass cap is readily assembled. I

placed, the wall 9 of the socket terminating with a thln crimping edge 10 at its upper V edge directly opposite the groove 5. A seallVhat I claim as new is I A transparent cap for pneumatic pressure gauge stems comprising a metal base having a screw-threaded opening and a cap receiving socket; a glass cap having a shoulder at its openend; a soft closure wire on the shoulder; and an inturned edge of the wall of the socket engaging the wire and seating i the same on the shoulder the outer wall having a diameter preventing the out-springing of the wire and the inturned edge preventing the tip-springing of the wire away from the shoulder making a permanent connection between the base and the glass cap.

In testimony whereof I have hereunto set I my hand.

CURTIS O. NEAL.

At the 40 

